In January 2024, NNSA/NFO completed the Final Supplement Analysis of the Site-Wide Environmental Impact Statement for the Continued Operation of the Department of Energy/National Nuclear Security Administration Nevada National Security Site and Off-Site Locations in the State of Nevada (DOE/EIS-0426-SA-01) (SA). NNSA/NFO prepared the SA in accordance with DOE’s National Environmental Policy Act (NEPA) implementing procedures (10 CFR Part 1021) to assess the potential environmental impacts of continued operations at NNSA/NFO facilities in Nevada, including the NNSS. The SA presents the results of an analysis of the potential impacts of actions/changes that have occurred at these facilities since publication of the Site-Wide Environmental Impact Statement for Continued Operation of the Department of Energy/National Nuclear Security Administration Nevada National Security Site and Off-Site Locations in the State Nevada (DOE/EIS-0426) (2013 SWEIS) and Record of Decision (ROD), and actions expected to occur within approximately the next five years.
The SA evaluates the potential impacts of these actions against the impacts presented in the 2013 SWEIS in the following areas: land use; infrastructure and energy; transportation and traffic; socioeconomics; geology and soils; hydrology; biological resources; air quality, climate, and noise; visual resources; cultural resources; waste management; human health and safety; environmental justice; and accidents and intentional destructive acts. Based on the analyses, NNSA/NFO determined that the potential impacts associated with the actions evaluated in the SA would not be significantly different than impacts presented in the 2013 SWEIS. Consequently, NNSA/NFO determined that: (1) the actions evaluated in the SA would not constitute a substantial change; (2) there are no significant new circumstances or information relevant to environmental concerns; and (3) no additional NEPA documentation is required at this time.